如何解决错误：{E201} RDF中属性元素的多个子元素而又不会丢失分隔符？

Question

我正在学习如何创建RDF，这是我的3种咖啡类型

<?xml version="1.0"?>

<rdf:RDF
xmlns:ex = "http://example.org/" 
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
>
    <rdf:Description rdf:about="ex:CoffeeShop">
        <ex:serves>
            <rdf:Description rdf:about="ex:Coffee">
              <ex:name>Brazilian Espresso</ex:name>
              <ex:usesTechnique>Espresso</ex:usesTechnique>
              <ex:isMadeOf>Brazilian Coffee Beans</ex:isMadeOf>
              <ex:roastingLevel>8</ex:roastingLevel>
            </rdf:Description>
            <rdf:Description rdf:about="ex:Coffee">
              <ex:name>Special Arabica</ex:name>
              <ex:usesTechnique>french pressed</ex:usesTechnique>
              <ex:isMadeOf>Arabica Beans</ex:isMadeOf>
              <ex:roastingLevel>6</ex:roastingLevel>
            </rdf:Description>
            <rdf:Description rdf:about="ex:Coffee">
              <ex:name>Colombian Latte</ex:name>
              <ex:served>non-steamed milk</ex:served>
              <ex:isMadeOf>Colombian Cocoa Beans</ex:isMadeOf>
              <ex:roastingLevel>9</ex:roastingLevel>
            </rdf:Description>
        </ex:serves>
    </rdf:Description>
</rdf:RDF>

但是当我用RDF W3C验证程序检查它时收到此错误。

Error: {E201} Multiple children of property element[Line = 16, Column = 52]
Error: {E201} Multiple children of property element[Line = 22, Column = 52]

但是如果我移走了，我将失去分隔，如何在不丢失分隔的情况下解决这些错误？

Answer 1

一种可能性，无需引入其他rdfs依赖项

<rdf:RDF
xmlns:ex = "http://example.org/" 
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
>
  <rdf:Description rdf:about="CoffeeShop">
    <ex:coffee_type rdf:parseType="Collection">
            <rdf:Description rdf:about="ex:Coffee1">
              <ex:name>Brazilian Espresso</ex:name>
              <ex:usesTechnique>Espresso</ex:usesTechnique>
              <ex:isMadeOf>Brazilian Coffee Beans</ex:isMadeOf>
              <ex:roastingLevel>8</ex:roastingLevel>
            </rdf:Description>
            <rdf:Description rdf:about="ex:Coffee2">
              <ex:name>Special Arabica</ex:name>
              <ex:usesTechnique>french pressed</ex:usesTechnique>
              <ex:isMadeOf>Arabica Beans</ex:isMadeOf>
              <ex:roastingLevel>6</ex:roastingLevel>
            </rdf:Description>
            <rdf:Description rdf:about="ex:Coffee3">
              <ex:name>Colombian Latte</ex:name>
              <ex:served>non-steamed milk</ex:served>
              <ex:isMadeOf>Colombian Cocoa Beans</ex:isMadeOf>
              <ex:roastingLevel>9</ex:roastingLevel>
            </rdf:Description>
    </ex:coffee_type>
  </rdf:Description>
</rdf:RDF>  

我从here中获取了语法提示，搜索RDF Collections